摘要
利用X射线衍射方法精确测量了2∶17型稀土化合物N d2A lFe15M n的晶胞参数及热膨胀系数并研究了其结构特征.结果表明,室温下,N d2A lFe15M n化合物具有单相的Th2Zn17型菱方结构(空间群为R 3m).对该化合物晶格常数的测量误差可以达到1-0 4,基本上可满足对一般位移型相变测量要求的精度.
The lattice constants and the thermal expansion coefficient of 2： 17 type rare earth-transition metal compound Nd2AlFe15Mn were obtained by means of X-ray diffraction. The results showed that Nd2AlFe15Mn compound has a rhombohedral Th2Zn17-type structure in room temperature. The errors of lattice constant in this compound were able to achieve 10^-4, which basically met the measuring precision in displacive phase transition.
出处
《天津师范大学学报（自然科学版）》
CAS
2005年第4期37-39,共3页
Journal of Tianjin Normal University：Natural Science Edition
基金
国家自然科学基金资助项目(50271022)
天津师范大学博士基金资助项目(52R010)
关键词
X射线衍射
热膨胀
晶胞参数
X-ray diffraction
thermal expansion
lattice constant
